bitmap vs electronic image

bitmap and electronic image both are nouns.

Word	Noun	Adjective	Verb	Adverb
bitmap	Yes	No	No	No
electronic image	Yes	No	No	No

As nouns, bitmap and electronic image are synonyms defined as:

bitmap and electronic image: an image represented as a two dimensional array of brightness values for pixels

bitmap (noun)	electronic image (noun)
an image represented as a two dimensional array of brightness values for pixels	an image represented as a two dimensional array of brightness values for pixels